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Mesofauna de las hormigas en el compost de la Corporación Universitaria Lasallista
(Corporación Universitaria Lasallista, 2004) Arango Gutiérrez, Gloria Patricia; Piedrahita Vera, Lina María
Introduction: The organisms that belong to Formicidae family are biologically and ecologically important in the vegetal material´s decomposition process generated in the Corporación Universitaria Lasallista, in Caldas, Antioquia, Colombia. Objective: By a taxonomic identification of each collected species, we aimed to determine and evaluate all of the different functions and behaviors they perform in the transformation of compost, in order to use the information as a parameter to establish an optimum quality and production standard for that compost. Materials and Methods: The organism’s samples were obtained by the falling traps method. This collection process was made during the months of March, April and May of 2003. They were cured and later identified by using the Serna´s and Vergara´s taxonomy keys. Results: Five sub-families of ants were found in the Corporación Universitaria Lasallista´s composters: ECITONINAE, PONERINAE, MYRMICINAE and FORMICIDAE.Conclussion: A big number of ant species were found, probably due to the high presence of other insects which are a food source for ants that usually hunt other kinds of arthropods.
Una visión al mundo de la búsqueda y recuperación de la información electrónica
(Corporación Universitaria Lasallista, 2004) Echavarría Ramírez, Andrés Felipe
The increasing number of web sites and resources provided by internet has made the process of search and recovery of useful information for schooling and research more difficult. Even though the Net has extremely important sources, these are unknown for the majority of traditional search engines. This is what it is known as “The Deep Net”. To access this small universe of internet, it is necessary to know the mechanisms, strategies and tools that facilitates and guarantee the achievement of our objectives.
La lluvia ácida: un fenómeno fisicoquímico de ocurrencia local
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Hernández Ángel, Marta Lucía
Acid rain is a phenomena associated to high production, depending mainly of fossilized fuel consuming and of certain agro cultural practices as burnings, which release several substances like sulphur and nitrogen oxides to the atmosphere, aporting the raw material to make up the sulphuric and nitric acids which later return to the hearth surface as liquids as sprays and affect the natural ecosystems. Rain water is slightly acid because it contains carbonic acid, formed from the atmospheric carbonic dioxide. Rain, which usually has a pH of approximately 5.6, can reach a measure close to 7.0, due to the presence of other alkaline substances in the atmosphere, and those substances neutralize the carbonic acid.
Fotocatálisis de aguas residuales de la industria textil utilizando colector solar
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Peñuela Mesa, Gustavo Antonio
Introduction: Photocatalysis made with sun light appears as a simple and economic alternative to treat wastewater, colored with dyes from the textile industry. The use of this technology for the degradation and mineralization the 84 orange reactive dyes, can open a new route different from the traditional oxidation processes. Objective: To study the photocatalysis with TiO2 in colored wastewater using a sunlight collector. Materials and Methods: A sunlight collector made up by three modules (each one made up by eight glass Schott-Duran pipes) was used. Each glass pipe is 48 cm of external diameter and 150 cm long and also contains an aluminum sheet, which allows the reflection of sunlight. The whole device had a re-circulation bomb and a thank, the sunlight collector had an inclination of 6 degrees in comparison with the floor and was facing North because it must be located according to the geographic position of the place. Only one condition was modificated for each experiment with the objective of studying its influence in the dye’s degradation. In this research work we show different combinations of hydrogen peroxide, titanium dioxide and air, used in the photo catalysis of the 84 orange reactive and waste water samples from textile industry. Results: The optimal concentrations found for 84 orange reactive in a 340 mg/lL concentration are: 40 mg/L of titanium dioxide and 2 mg/L of hydrogen peroxide with no air injection. Conclusion: With an appropriate quantity of titanium dioxide and a well calculated concentration of hydrogen peroxide, very good concentration percentages of the 84 orange reactive and colored waste waters are obtained, besides of high mineralization percentages.
El desarrollo en Colombia: historia de una hegemonía discursiva
(Corporación Universitaria Laslallista, 2004) Restrepo Velásquez, Juan Carlos
Introduction: The following text is a part of the finds of the research “EXPLORATORY ANALYSIS OF THE CONCEPT OF DEVELOPMENT INCLUDED IN THE COLOMBIAN DEVELOPMENT PLANS. CONTINUITIES AND FRACTURES. PERIOD 1950-2000”,which tries to establish, theoretically and from an exploratory analysis line, the historical practice of the concept of development in Colombia, according to the concept of development that appears in its National Development Plans and in similar documents during the second half of the XX Century. This research produced three finds: First, the constant conception of economical growth as the only idea of development. Second, evident fractures and discontinuities in the development speech, due to the imperant focuses about the topic and, third, the foreign speech practices in Colombia’s development. This latter find is the one presented with the title: COLOMBIAN DEVELOPMENT: HISTORY OF A HEGEMONICAL SPEECH. Materials and Methods: This research work is theoretical and is made under qualitative research parameters, allowing us to establish a scientific method to have an adequate approach to the research object and interact with it. The approach of this research is established by following the route offered by the documental and historical research method in the multicyclical framework of qualitative research. In this route, hermeneutics (attained to the hermeneuticalhistorical method) was the focus used to approach the interpretation of texts and the appropriate contexts, with the analysis of contents´ method. By the use of analysis matrixes, common elements are inferred and those, from the exploration we are making, have been called finds. They are duly documented and evidenced afterwards. Results and Main Conclusions: From the speeches used for the national development plans, effects of truth and reality have been created, and this fact has implied a control of the used words that, at the end of the day, is the one that produces the hegemonical speech in this case. This sort of speeches have been consolidated from the profesionalization of development and its raising to an institutional level.
El desarrollo de productos como estrategia formativa de ingenieros de alimentos
(Corporación Universitaria Lasallista, 2004) Moncayo Castillo, Franco Alexis
“Sobre las virtudes y los vicios” de Aristóteles
(Corporación Universitaria Lasallista, 2004) Naranjo Boza, Nicolás
Main theme: History of Ethics. Offers material to think about Ethics as a philosophical problem as well as a practical one. A complete artistotelian text in a Spanish translation from a classical English translation is presented. It includes an Introduction that: 1) Contextualizes the text. 2) Analyzes its formal structure as a didactic method to teach values. 3) Offers and interpretation about how the Ethics of a greek was appropriated by the Roman Catholic Church.
Sobre un arte literario único en las supuestas “fábulas” de Leonardo da Vinci (la unión entre ciencia, amor y arte)
(Corporación Universitaria Lasallista, 2004) Naranjo Boza, Nicolás
The text deals with the models that inspired Leonardo to make his notes (whether scientific or not). There is a study of his scientific writing which for 500 years has been a paradigm. The article exemplifies that to write well with a scientific approach the world around us must be observed and that language itself must be studied thoroughly. It briefly deals with the diverse writing styles that Leonardo explored. There is a discussion about the so-called “literary fables” actually being fables in the classical sense of the term and rather being scientific notes.
Porquinaza en la alimentación animal
(Corporación Universitaria Lasallista, 2004) Castrillón Quintana, Olivia; Jiménez Pérez, Ricardo Andrés; Bedoya Mejía, Oswaldo
In the whole world, the biggest problems faced by pig breeders is the generation of feces, which having a great potential of nutrients, contaminate the environment and can become the main obstacle for the future of the animal industry. Pig feces have been handled traditionally under a pigs-lawn-milk system, using the soil improvement for lawn with the fertilization of organic material, obtaining a better dairy production. To use the contents of the nutrients contained specially by pig’s manure, an alternative can be the conversion to unicellular protein, in a solid state fermentation process with microorganisms.
La historia fascinante de un viaje por la aventura apasionante de aprender y aprenderse
(Corporación Universitaria Lasallista, 2004) Castrillón Quintana, Olivia
De las interacciones múltiples a la reconfiguración del sujeto comunicativo
(Corporación Universitaria Lasallista, 2004) Ramírez Cortés, Juan Pablo
The process of constructing messages and giving them logical senses in the context of the virtuality and electronic media requires, at least, an initial theoretical reflection. Cybermedia became, in a very short time, novel alternatives with enough appealing power to fulfill the imagination and the informative desires of a new generation of people, whose basic characteristics are the level of response and their pressure on the traditional mass media. To act consequently and to preserve the professionalism of the communication in new cybermedia environments are the task proposed in this document.
Impacto social en los participantes del Programa de Educación Sanitaria en Manipulación de Alimentos y Convivencia Social
(Corporación Universitaria Lasallista, 2004) Alzate Tamayo, Luz María; Sandino Restrepo, María del Carmen
Introduction: Since 1997, the Engineering Program of Corporación Universitaria Lasallista has been developing a task of social projection, with the “Sanitary Education Program on Food Handling and Social Coexistence” addressed to parents from the 1st and 2nd stratification levels who work, mainly, in school restaurants, street food sales, domestic service work and social programs of community mothers. The program is financially supported by the Rodrigo Arroyave Arango Foundation since 1998. Objective: To measure the impact of this program among its participants. Materials and methods: To collect information, a survey was applied to the participants and an observation guide for the visits to school restaurants, community homes and other places, was used. Results: The program has had a great impact, because it has allowed an increase of the usual food handling practices, diminishing the risk of gastrointestinal diseases among the children from community homes and school restaurants. Further benefits were found, specially those related to self-confidence, the respect to others and tolerance to family and neighbors, increasing the quality of life of the participants and their families. Conclusion: The Corporación Universitaria Lasallista must keep on offering this program, making trough it a contribution to the reconstruction of social tissue in our region.
Evaluación de la fotodegradación sensibilizada con TiO2 Y Fe3+ para aguas coloreadas
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Rodríguez Restrepo, Alejandra
The necessity of keeping the environment in a good shape, has taken us to look for efficient methods to eliminate chemical compounds, produced by several human activities, which contaminate it. Water pollution is very important, because contaminants can accumulate and be transported by brooks, rives, lakes, dams and underground water sources, affecting life forms around them and the health of humans. The most important contamination sources of ground level and underground water sources are waste waters from domestic and industrial origins. Photocatalytical technologies are very promising t be applied in our country, because the use of sun energy reduces, in a very high measure, the cost. Photocatalytical reactors are easy to use, use sun energy and the radiation of ultraviolet lamps. Besides, they are very easy to be adapted for a great variety of aplications.
Satisfacción de los profesores con los servicios bibliotecarios de la Corporación Universitaria Lasallista, agosto de 2003
(Corporación universitaria Lasallista, 2004) Rodríguez Gázquez, María de los Ángeles; Uribe Londoño, Luz María
Introduction:User’s satisfaction is an indicative of the quality of the library’s services, evaluated from the perspective of Faculty members as customers of same service. Objetive: To describe the satisfaction level of the Faculty members with the services provided by the library. Materials and Methods: A descriptive study was made, using as an instrument to acquire the information a self-applied questionnaire. The satisfaction with the library services was evaluated through a 60 items scale, graded from 1 to 5, giving a 1 grade to total discomfort and 5 to a maximum satisfaction. The information was put in a data base made with a SPSS vr. 11.5 statistic software, with which the tabulation plan was made. Results: A total of 70 faculty members were surveyed. During last semester, three out of five of them used the library services one or more times per week, considering this as an appropriate frequency of use. The general satisfaction with this service was graded with a 4.0. According to the faculty’s opinion, the information resources offered by the library are enough, although they suggest an increase in the quantity and quality of books and journals. Conclusion: There is an adequate satisfaction of the Corporación Universitaria Lasallista´s faculty members with the services provided by its library.
Mesofauna de los colémbolos en el compost de la Corporación Universitaria Lasallista
(Corporación Universitaria Lasallista, 2004) Arango Gutiérrez, Gloria Patricia; Macías Mazo, Karina Isabel
Samples were taken by using the falling traps method, putting three traps in each composter at a 20-30 cm depth from the surface. The collection of collembolas was done three times a week, during three months, in 2003. The collected organisms were duly cured, to be taxonomically identified afterwards.
Curvas de crecimiento de crías de vacuno levantadas en la Corporación Universitaria Lasallista
(2004) Agudelo Gómez, Divier Antonio
Introduction: One of the problems found in cattle exploitations is to typify the weighting of calves so they can be compared. To the moment, the most common practice in those exploitations is a lineal interpolation between two consecutive weightings, method that imposes severe restrictions concerning the period of time between weightings and determines the elimination of a great number of registrations. Objective: To make a graphic representation of the growth curves of four calves, in order to obtain the most appropriate equation for a better adjustment. Materials and methods: Four calves were monitored during 8 months (two Holstein cow calves, a Holstein bull calf and a mixed male bull calf, all of them born in close dates), the growth system used was bucket-stake. The males consumed milk until they were 85 days old and the females until they were 70, every day they were given 4 litters of milk-replacer: Processed cattle food was given to them until their fifth month, and in this period each animal consumed 12 kg for a daily media rate of 80 gr. When they were two months old, the bucket-stake system was changed to a rotatory cattle keeping system on Pennisetum clandestinum grass (kikuyu). Since their first month of life, they were given 10 kg of Arachis pintoi (forage peanut) not dehydrated, coming from the pruning of the garden keepers from the Corporación´s facilities. The data collection was made every week using a bovine metric tape. Results: A total number of 31 observations was obtained. The growth speed was higher in the bull calves, fact that can be explained by the higher consuming of milk replacer, because they had more access to it. The daily rate of weight gain was 589gr and 518 for the males and the females, respectively.
Interacciones entre comunicación, desarrollo y cultura en Colombia
(Corporación Universitaria Lasallista, 2004) Tous Ramírez, Juan David
Communication, from a theoretical point of view, is not considered as a science. It is a field of study, a gathering point for a wide number of disciplines, because it is seen from different sciences and this has made the “communication theory” a very complex universe. Other words as “development” and “culture” have similar characteristics. Each science uses them as terms and epistemological tools in different ways. In the case of Colombia, communication, development and culture have been extremely important words in the social science studies, and our exercise in this work is a look at some interactions these terms have had in the recent history of the country.
Fotodegradación con TiO2 del colorante Rojo Amaranto en aguas
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Mejía Franco, Edwin Alejandro; Peñuela Mesa, Gustavo Antonio
Introduction: Sensitivized biodegradation, with TiO2 and sun light, is a technique which can be used as a depuration system by itself, or as a tertiary process, especially for industrial remains treatment. Photocatalytical technologies are very promising for their application on the solving of water contamination problems. Those technologies are very well regarded to be implemented, because the use of sun light reduces in a great measure the costs of the treatment. The use of this technique to degrade and mineralize the Amaranth Red Dye, can be implemented as a more appropriate alternative than other traditional oxidation processes. Objective: To study heterogeneous catalysis of Amaranth Red dye, by the use of a sun light collector and titanium oxide as a catalyst. Materials and methods: For the photocatalysis process, a composed cylinder parabolic sunlight collector (CPC) was used and the conditions under which the higher measurements of color removal were gotten were analyzed. The variables analyzed for this purpose were the concentration of the catalyst (TiO2), the hydrogen peroxide concentration and the relation between both of them before the degradation and mineralization of the color. Results:For this work synthetic solutions dyed with 100mg/L Amaranth Red color prepared with potable water. The most influent parameter on the degradation percentages reached, is the use of TiO2 mixed with hydrogen peroxide. The maximum degradation percentage obtained was 93.48% for titanium dioxide concentration of 150mg/L and 2 ml/L of hydrogen peroxide. Conclussion: The used of appropriate concentrations of TiO2 and H2O2 allows to obtain good degradation and mineralization percentages of the Amaranth Red Dye contained in water.
Ciencia, Libertad y Ética Una mirada paradigmática
(Corporación Universitaria Lasallista, 2004) Uribe Cano, Juan Manuel
Brief:This article is intended to show how, and despite of the overwhelming development of science during the 20th Century, a concept of ethics that a “humanizing project” can fit and be the main objective of such development and progress. In this context, we have the fact that science has moved far from the world of life, in which the reality of social and individual beings takes place, progressly becoming an instrument for isolation and not a way to drive human beings to their freedom.
Sinergia entre edulcorantes no calóricos y el ácido fumárico
(Corporación Universitaria Lasallista, 2004) Restrepo Gallego, Mauricio
Given the great demand of sugar-free products it is necessary to find new applications for traditional products and additives. This is the case of the fumaric acid, for which a sweetener or sweeteners mixture that grants a good level of synergy in products like powder beverages is being searched. The current investigations suggest that the encapsulation process is the best alternative to achieve a good balance between acidulants and sweeteners, taking advantage of their physicochemical and sensorial qualities.

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